Question

the mean of eight number is 25 if 5 is subtracted from each number what will be the new mean​

Answer 1

Answer:

Mean = 20

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Answer 2

Answer:

new mean =20

25 = (X1+x2.....+x8)/8

25×8= (X1+X2.......+x8)

200 = (X1+ X2.......+x8)

let new mean =a

a=(X1+X2.......+x8)-5×8/8

a=(X1+X2.......+x8)-40/8

putting the value

a= 200-40/8

a=160/8

a=20